IB Chemistry SL Reactivity 3.4.4 Electrophiles

Practise recognising electrophiles as electron-deficient species that accept an electron pair from a nucleophile. Identify positive charge, partial positive charge or an…

Syllabus
First assessment 2025
Objective
3.4.4
Level
SL

Exam points

  • locate a positively charged or electron-deficient atom able to accept an electron pair
  • show bond formation by directing the nucleophile's pair towards the electrophilic centre
  • classify an electrophile as a Lewis acid while separating it from nucleophilic species

3.4.4—Electrophiles question 1

[Maximum number: 1]

Which species is the electrophile?

CH3Br+OH−→CH3OH+Br−\mathrm{CH}_{3} \mathrm{Br}+\mathrm{OH}^{-} \rightarrow \mathrm{CH}_{3} \mathrm{OH}+\mathrm{Br}^{-}
A

OH−\mathrm{OH}^{-}

B

Br−\mathrm{Br}^{-} c. CH3OH\mathrm{CH}_{3} \mathrm{OH} D. CH3Br\mathrm{CH}_{3} \mathrm{Br}

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